Install App
There are two ways to install. They are not mutually exclusive; you can pick either or both.
Add to a server
This is the right install if you want the commands to be available to everyone in a server, and if you want server-wide follow notifications piped into a channel.
Add to your user
User installs let the bot's commands follow you into any server or DM, even places where the bot isn't formally installed. Use this if you want personal DM follow notifications, or if you want to look up players in DMs and group chats.